Hubble Tension, Explained | Adam Riess

The universe isn’t adding up—and it’s creating a crisis in cosmology. Nobel Prize winner Adam Riess explains why measurements of the universe’s expansion rate from its earliest light and from nearby galaxies don’t match, and how this growing gap threatens the foundations of our standard model of the cosmos.For more, check out the extended interview with Adam RiessLearn more about NOVA and subscribe to our YouTube channel.

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